<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper class="swiper1" :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,i) in goods_info.pics" :key='i'>
        <image :src="item.pics_big" @click='preview(i)'></image>
      </swiper-item>
    </swiper>
    
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goods_info.goods_price}}</view>
      <!-- 商品主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名字 -->
        <view class="goods-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="17" color='gray'></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf"><text>快递：免运费</text></view>
    </view>
    
    <!-- 富文本 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    
    <!-- 商品导航组件区域 -->
    <view class="goods_nav">
      <uni-goods-nav :options="options" :fill="true" :button-group="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
    </view>
  </view>
</template>

<script>
  import {mapState,mapMutations,mapGetters} from 'vuex'
  
  export default {
    computed:{
      ...mapState('m_cart',[]),
      ...mapGetters('m_cart',['total'])
    },
    watch:{
      // 页面首次加载完毕后，不会调用侦听器
      // total(newVal){
      //   const findResult=this.options.find(x => x.text==="购物车")
      //   if(findResult){
      //     findResult.info=newVal
      //   }
      // }
      
      total:{
        handler(newVal){  
          const findResult=this.options.find(x => x.text==="购物车")
          if(findResult){
            findResult.info=newVal
          }
        },
        // immediate属性用来声明此侦听器，是否页面加载完毕后立即调用
        immediate:true
      }
    },
    data() {
      return {
        goods_info:{},
        options: [{
        			icon: 'shop',
        			text: '店铺',
        			infoBackgroundColor:'#ff0000',
        			infoColor:"red"
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        	    buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ff0000',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    }
        	    ]
      };
    },
    onLoad(options){
      const goods_id=options.goods_id
      this.getGoodsDetail(goods_id)
    },
    methods:{
      ...mapMutations('m_cart',['addToCart']),
      
      async getGoodsDetail(goods_id){
        const {data:res}=await uni.$http.get('/api/public/v1/goods/detail',{goods_id})
        if(res.meta.status!==200) return uni.$showMsg()
        
        // 为了解决图片之间有缝隙
        // replace(/webp/g,'jpg')为了解决后缀名webp的图片
        res.message.goods_introduce=res.message.goods_introduce.replace(/<img /g,'<img style="display:block;"').replace(/webp/g,'jpg')
        
        this.goods_info=res.message
      },
      preview(i){
        // 调用uni.previewImage()方法预览图片
        uni.previewImage({
          // 预览时，默认显示图片的索引
          current:i,
          // 所有图片url地址的数组
          urls:this.goods_info.pics.map(x=>x.pics_big)
        })
      },
      onClick(e){
        if(e.content.text==='购物车'){
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      buttonClick(e){
        if(e.content.text==='加入购物车'){
          // 组织商品的信息对象
          // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods={
            goods_id:this.goods_info.goods_id, 
            goods_name:this.goods_info.goods_name, 
            goods_price:this.goods_info.goods_price, 
            goods_count:1, 
            goods_small_logo:this.goods_info.goods_small_logo, 
            goods_state:true
          }
          // 调用addToCart方法
          this.addToCart(goods)
        }
      }
    }
  }
</script>

<style lang="scss">
  .swiper1{
    height: 750rpx;
    
      image{
        width:100%;
        height:100%;
      }
  }
  .goods-info-box{
    padding: 10px;
    .price{
      color:#C00000;
      font-size:18px;
      margin:10px 0;
    }
    
    .goods-info-body{
      display: flex;
      justify-content: space-around;
      .goods-name{
        font-size: 13px;
        margin-right: 10px;
      }
      .favi{
        display: flex;
        width: 100rpx;
        font-size: 12px;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border-left: 1px solid #efefef;
        color:gray
      }
    }
    .yf{
      font-size: 12px;
      color:gray;
      margin:10px 0
    }
  }
  .goods_nav{
    position: fixed;
    bottom:0;
    left:0;
    width:100%
  }
  .goods-detail-container{
    padding-bottom: 50px;
  }
</style>
